Vocabulary Builder is a free Chrome add-on developed by Oleka. It is a powerful tool that allows users to create their own personalized vocabulary lists. With Vocabulary Builder, you can add words, their synonyms, and antonyms, helping you expand your language skills.

The program offers a search function, allowing you to easily find words and add them to your list. This feature is particularly useful when you come across unfamiliar words while reading or studying.

In addition to building your vocabulary, Vocabulary Builder also offers a flashcard game. This game helps you practice and reinforce your knowledge of the words you have added. You can choose which words to be presented based on their dates of addition, allowing you to focus on words you recently learned.

Vocabulary Builder is a valuable tool for anyone looking to enhance their language skills. Whether you're a student, a professional, or simply someone who enjoys learning new words, this add-on provides a convenient and effective way to expand your vocabulary.